Regional Air Quality Planning

MAG was designated by the Governor of Arizona in 1978 and recertified by the Arizona Legislature in 1992 to serve as the regional air quality planning agency for the Maricopa County nonattainment area. In this role, MAG develops regional air quality plans to address air pollution problems. In June 2016, the Governor certified MAG as the lead planning organization for the Pinal County PM-10 and PM-2.5 nonattainment areas. MAG will develop air quality plans for these areas in cooperation with the Sun Corridor Metropolitan Planning Organization.

MAG’s latest regional air quality plans for carbon monoxide, ozone and particulate matter are included below.

PLEASE NOTE: Because all the files on this page are very large files, right click and choose "Save Target As..." to save the files to your disk.

MAG 2025 Clean Air Act Section 179B(b) Retrospective Demonstration of the Impact of International Emissions on Ozone Concentrations in the Maricopa Nonattainment Area

• MAG 2025 Clean Air Act Section 179B(b) Retrospective Demonstration (PDF)
• MAG 2025 Clean Air Act Section 179B(b) Retrospective Demonstration – Appendices (PDF)

MAG 2025 Eight-Hour Ozone Plan - Submittal of Applicable Moderate Area Requirements for the Maricopa Nonattainment Area

• MAG 2025 Eight-Hour Ozone Plan – Submittal of Applicable Moderate Area Requirements for the Maricopa Nonattainment Area (PDF)
• MAG 2025 Eight-Hour Ozone Plan – Appendices (PDF)

2023 Five Percent Particulate Plan for PM-10 for the West Pinal County Nonattainment Area

• 2023 Five Percent Particulate Plan for PM-10 for the West Pinal County Nonattainment Area (PDF)
• 2023 Five Percent Particulate Plan – Appendices Volume 1 (PDF)
• 2023 Five Percent Particulate Plan – Appendices Volume 2 (PDF)
• 2023 Five Percent Particulate Plan – Appendices Volume 3 (PDF)
• 2023 Five Percent Particulate Plan – Appendices Volume 4 (PDF)
• 2023 Five Percent Particulate Plan – Appendices Volume 5 (PDF)

MAG 2013 Carbon Monoxide Maintenance Plan

• MAG 2013 Carbon Monoxide Maintenance Plan for the Maricopa County Area
• MAG 2013 Carbon Monoxide Maintenance Plan for the Maricopa County Area - Appendices
• MAG 2013 Carbon Monoxide Maintenance Plan for the Maricopa County Area - Combined Document

MAG 2012 Five Percent Plan for PM-10

• MAG 2012 Five Percent Plan for PM-10 for the Maricopa County Nonattainment Area (PDF, 2 MB)
• MAG 2012 Five Percent Plan for PM-10: Appendices, Volume 1 (PDF, 5 MB)
• MAG 2012 Five Percent Plan for PM-10: Appendices, Volume 2 (PDF, 5 MB)
• MAG 2012 Five Percent Plan for PM-10: Main Plan and Appendices (PDF, 12 MB)